<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="./lib/vue.js"></script>
</head>
<body>
    <div id="app">
        <button :title="msg2" @click='show'></button>
    </div>
   <script>
        const vm = new Vue({
        el : '#app',
        data : {
            msg : 'Welcome To index',
            msg2 : 'this is a title'
        },
        methods : {
            show : function(){
                alert("hello world");
            }
        }
    });
   </script>
</body>
</html>